Patents by Inventor John H. Hapgood

John H. Hapgood has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Solar powered aircraft warning device
    Patent number: 5537111
    Abstract: A solar-powered, illuminated aircraft warning marker for connection to suspended cables and overhead transmission lines includes a polygonal housing having a plurality of light elements attached to different sides of the housing. The warning marker includes solar cells, storage batteries and electrical circuit apparatus for selectively illuminating the light elements during low ambient light and nighttime conditions.
    Type: Grant
    Filed: October 25, 1993
    Date of Patent: July 16, 1996
    Inventors: John S. Martin, John H. Hapgood, Clarence Rash, Parley P. Johnson
  • Video highlight attenuation processor
    Patent number: 4214272
    Abstract: A video highlight attenuation processor is disclosed which comprises an it circuit from which first and second signals corresponding to an input signal are derived, a peak detecting and inverting circuit which detects and inverts peak portions of the first signal to produce an intermediate signal, and a mixer which combines the intermediate signal and the second signal such that an output signal is produced which corresponds to the input signal with the D.C. level of the peak portions attenuated.
    Type: Grant
    Filed: April 17, 1979
    Date of Patent: July 22, 1980
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: John H. Hapgood